Steam-boiler



(No Model.)

T. J. LINNEKIN.

STEAM BOILER.

No. 581,512. Patented Apr. 27, 1897.

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UNITED STATES THOMAS J. LINNEKIN, OF BROOKLYN, NEIV YORK.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 581,512, dated April 2'7, 1897.

Application filed January 12,1897.

extended from the water-legs to the main boiler for water to circulate from one to the other. In these instances the water legs or sides have been expensive and difficult to construct or to repairf In my present invention I make use of fiattened vertical boiler-sections forming water- Walls to the fire-chamber, extending from the front plate of the furnace back to the bridgewall, or preferably to the extreme rear end of the boiler, and these are elliptical in crosssection, so as to obtain great strength and also to be easy to construct, and the waterwalls are supported on concave bearings with yielding material, such as asbestos, between such concave bearings and the under surfaces of the water-walls, and the connections between the water-walls and the main boiler are bolted on, so that the parts are easily separated if repairs become necessary.

By the aforesaid improvements a savingin fuel is effected, because the fire is in direct contact with the water-walls, and the heat, which would otherwise be dispersed through the fire-brick employed with ordinary tubular boilers, is utilized in heating the water in the water-walls, and where the boiler-sections forming the water-wa1ls are liable to injury by the direct contact of the fuel such water-walls can be removed with facility and either repaired or others substituted.

In the drawings, Figure 1 is an end view of a pair of boilers with the hood or base of the smoke-stack removed and one of the boiler and water walls in section. Fig. 2 is a side view of the boiler and one of the water-walls and a section of the back flue.

The boilers A A are represented as similar Serial No. 618,908. on model.)

is provided with doors E for the insertion of fuel into the fire-chamber and upon the gratebars F, and the bridge-wall is provided at G, and the flue beyond thesame extends beneath the boiler to the rear flue B.

I have shown the present improvements as applied to the two boilers A and A for an object hereinafter stated, but the water-walls can be applied at the two sides of a single fire-chamber, the water-Walls and connections being similar.

The Water-walls H H H are made as boilersections of the proper length and flattened or elliptical in cross-section, so as to extend from the grate-bars or near them up to the sides of the boiler, and these boiler-sections form water-walls, and they are to be of metal sufficiently strong, and tie-bolts or braces are provided, as usual.

Each water-wall rests at its under side upon a concave bearer I, fitting, or nearly so, the curvature of the under edge of the waterwall, and a layer of asbestos or similar yielding material intervenes, as at 4, between the concave bearer and the under side of the water-Wall, so as to form a yielding bearing and to allow for the slight motion incident to expansion or contraction. These concave bearers are preferably at the front plate D and near the bridge-Wall, and tie-barsK are usually provided between the sides of the boiler and the outer sides of the water-walls. These tie-bars maybe riveted upon the sides of the boiler and bolted to the sides of the waterwalls to allow for disconnecting the parts, or when rivets are employed at both places they can be cut off, as usual, when it becomes necessary to disconnect the water-walls from the boiler.

Manholes and covers are usually provided at the ends of the boilers, as at L, and handholes and plates in the lower portions of the water-walls at the front ends, as shown at M,

to give access to the respective parts for the removal of sediment or for repairs.

The tubular connections between the water-walls and the main boilers are advantageously in the form represented-that is to say, the bent pipes N extend down from the front ends of the boilers to the lower portions of the water-walls at the ends-and they are connected to the respective parts preferably by screw-bolts, and the pipes O extend from the upper portions of the water-walls to the sides of the boiler, near but below the waterline, so that there may be a constant circulation of water down the pipes N and up the pipes O by the action of the heat, and the pipes P extend to the supply-pump, so that the feed-water enters near the bottom of the water-walls and becomes heated as it circulates upward into and through the boiler. In this manner a very rapid circulation is obtained for conveying the heat from the waterwalls directly into the boiler in the production of steam.

here two boilers are used side by side, as shown in the drawings, I prefer to make the intermediate water-wall H sufficiently high to extend closely tothe adjacent surfaces of the boilers in order that the space between the boilers and above the water-wall 11 may be filled in with fire-brick, and in this construction the rising pipe 0 from the intermediate water-wall II preferably passes up from the intermediate water-wall and near the back end, so as to be built in with the fire-brick, and the upper end terminates with branches passing to the two boilers, and with this intermediate wall H the pipe N is advantageously made, with the branches passin g to the respective b0ilers,as shown in Fig. 1.

The rear wall Q of the rear flue Bis advantageously set at an inclination, as represented in Fig. 2, in order that the products of combustion may be kept closely adjacent to the back lower portions of the boilers, and the arch R covers the upper end of the rear flue L, and such arch and the cross-bearer S will not be exposed to undue heat, because the products of combustion have an opportunity to expand into the larger upper end of the rear flue, and they are drawn through the boiler-fines with rapidity, so that this construction increases the eiiiciency of the products of combustion and at the same time renders the brickwork more durable.

Outside the rear wall Q of the flue B it is advantageous to employ loose non-conducting material, such as asbestos, between the brickwork and the inclosing case T.

In stationary boilers brickwork may be employed outside the water-walls, but in marine boilers it is ad\ *antageous to employside cases U outside of the water-walls and between the same and the angle-iron boiler-supports V,

which may be of any desired character and come up against the under side of the brackets V upon the boilers A A.

I claim as my invention- 1. The combination with the main boiler, of water-walls formed of boiler-sections at each side of the fire-chamber, concave bearers and yielding material such as asbestos for supporting the water-walls, tubular connections extending from the lower part of the boiler at the end down to the lower portions of the water-walls, pipes rising from the wa ter-walls and passing into the main boiler below the water-line, substantially as set forth.

2. The combination with the two horizontal boilers placed side by side, of water-walls at the outer sides of the fire-chambers, and a water-wall between the two ire-chambers rising up between the two boilers, tubular connections for the circulating water from the ends of the boilers down to the lower portions of the water-walls, pipes rising from the upper portions of the Water-walls and passing into the boilers below the water-1ine,substantially as set forth.

3. The combination with the horizontal Hueboiler and the front plate, of water-walls formed of flattened boiler-sections and one at each side of the fire-chamber, bearers at the front plate and near the bridge-wall for the water-walls and tubular connections from the boiler to the water-walls for the water to circulate, substantially as set forth.

4. The combination with the horizontal flueboiler and the front plate, of water-walls formed of flattened boiler-sections and one at each side of the fire-ehamber, bearers at the front plate and near the bridge-wall for the water-walls and tubular connections from the boiler to the water-walls for the water to circulate, the water-walls extending to the rear end of the boiler, or nearly so, and a flue with an inclined back wall and arch over the top for the products of combustion to pass from the fire over the bridge-wall below the boiler and between the water-walls to the back flue returning through the tubes of the boiler, substantially as set forth.

5. The combination with the two horizontal boilers and their fire-chambers, of a water-wall between the two fire-chambers extending up between the two boilers, a pipe extending from the lower parts of the boilers at their ends down to the end of the waterwall, and a pipe rising from the top of the water-wall between the two boilers and connected at its upper end to such boilers, sub stantially as set forth.

Signed by me this 9th day of January, 1897.

TI-IOS. J. LINNEKIN.

\Vitnesses:

S. T. HAVILAND, (Inns. l-I. SMITH. 

